He became widely known and highly regarded because of a television and radio broadcast series produced by the ORF, where he introduced his viewers and listeners to the world of opera and operetta with outstanding knowledge of the subject matter and marvelous humor.

Marcel Prawy maintained close friendships with many prominent singers, composers and musicians, such as Leonard Bernstein and Robert Stolz. He was awarded numerous awards and honours by the nation and internationally, including becoming honorary citizen of Vienna and Miami.

Hardly anyone succeeded in picturing opera to his audience as impressively as he did. And thus Prawy became an institution of the Viennese opera as the National Guide to Opera (Opernführer der Nation).